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8.
a. yes
b. no
Solution. Yes: the cube has been rotated by 90 degree toward the east. hiding one of the visible sides while showing a new one.
Answer. a
9.
a. yes
b. no
Solution. Yes: the cube has been rotated by 90 degree toward the west. hiding one of the visible sides while showing a new one.
Answer. a
10.
a. yes
b. no
Solution. Yes: the cube has been rotated by 90 degree toward the north. hiding one of the visible sides while showing a new one.
Answer. a
Test Answer
1. (a) 2. (a) 3. (a) 4. (b) 5. (a) 6. (a) 7. (a) 8. (a) 9. (a) 10. (a)
